ASTM D6370-99 Compositional Analysis of Rubber by Thermogravimetry (TGA)

ASTM D6370-99 Compositional Analysis of Rubber by Thermogravimetry (TGA)

ASTM D6370-99 test method is used to determine the composition of rubber using the thermogravimetric (TGA) technique. It is used to determine the amounts of organics (oil, polymer), carbon black, and ash (filler) present in a rubber compound.

    Scope:

    ASTM D6370-99 test method is used to determine the composition of rubber. The information obtained from this test is used in quality control, material screening, and other occasions where a compositional analysis or comparison to a known material is required. This test method is not suitable for rubber compounds containing filler materials that decompose in the temperature range of 50 to 800°C. 

    Test Procedure:

    In ASTM D6370-99 test method, a rubber test sample is placed in the platinum pan of the calibrated Thermogravimetric Analyzer (TGA). Argon or nitrogen purge is applied. The sample is heated to 50°C, and the instrument is allowed to equilibrate for at least 2 min. It is heated from 50 to 560°C at 10°C/min. The sample is cooled to 300°C and allowed to equilibrate for at least 2 min. The purge gas is changed to air or oxygen. The sample is heated from 300 to 800°C at 10°C/min.

    Specimen Size: 

    The following information is reported: 

    Identification of the test sample. Percentage of organics, carbon black, and ash found.

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